CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax	$ 59	$ 78	$ (279)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax	(1)	0	0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	$ (42)	$ 22	$ 68